[Nouveau] [Bug 56461] NV11 black screen & kernel hang on loading nouveaufb

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56461

--- Comment #24 from Chris Paulson-Ellis <chris at edesix.com> ---
(In reply to comment #23)
> This is probably another bug (you are really lucky ;).

I will bisect again. Don't hold your breath!

> Is timer/nv04.c change needed for 2a44e499 to light up your monitor?

No. I'm only using it when running the patched nouveau git HEAD. Even then I
can leave it out without anything changing - It just suppresses this warning:
nouveau W[  PTIMER][0000:01:00.0] unknown input clock freq

When running the patched git HEAD... Although the LCD is not being driven, the
driver isn't completely dead. I can start and stop X and the screen will go
white, then fade to black each time I do it. This suggests that the backlight
control & power management are okay, but the display timings are wrong. Looking
at the working & broken console output, they both show the same pixel clock. Is
there some way to get the driver to output more verbose display timing info
(fbset -i shows all zeros in the timing line in both the working & non-working
cases)?

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